Bernard Jumentier (24 March 1749 – 7 December 1829) was a French composer of classical and sacred music as well as maître de chapelle.

The son of a vine-grower, destined for the ecclesiastical state by his parents, Bernard Jumentier entered the seminary of Chartres to attend his studies.

A follower of Jean-Philippe Rameau and Christoph Willibald Gluck, from 1783 to 1787, he presented some of his motets, in the chapel of Louis XVI at Versailles, and at the Notre Dame of Paris cathedral.

In 1793, when the belongings of the Cathedral chapter of Saint-Quentin were confiscated and the choir house seized and then sold as bien national, he found himself, if not without resources and without asylum, at least somewhat seriously destitute (the Ecclesiastical Revolutionary Committee nevertheless granted the church musicians a small pension, calculated according to their years of practice).

He was the owner of the Stehlin harpsichord dated 1750, given in legacy and exhibited at the Antoine-Lécuyer Museum [fr] of Saint-Quentin, an eminent example of the great French craft of the 18th century.